hi,

I would like to know if with the hobbycnc rooter I would be able to create 3d shapes.
I want to build a RC plane prototype mold so my idea is under 3d sofltware i want to cut my model in 5cm slices that I will cut under the rooter...what do you think of that?

Are you talking about this router? http://www.hobbycnc.com/plans/plans.htm
It can do 3D shapes, but not 5cm thick. I think the free plans posted here would give you the size you needed.

yes this is the one, but i can modify the parts in order to have higher z range

I think it will only be good for cutting foam if you increase the Z to 5cm.